If he does he will have a problem with the physical part of the game. Alot of young German players have went that way and packed it in after a short time. You need to be tough. He lacks on that part of the game but if he wants it bad enough he will learn.
On the other hand those that stayed in Germany, have rarely got a chance to make it later on.
Markus Eisenschmid went over after not being drafted and while he never was, he earned an AHL contract and we'll have to wait and see where it leads.
It went the same way for Mathias Niederberger, who ultimately returned to Germany.
It seems that NHL teams will not draft German players out of Germany. If they draft anyone at all, he has to have proven himself in North America. And why not, there is not a lot of teams that even look at the German market, so you might as well wait and see how players develop and just sign them as free agents for little money and give them a try. Not that this has really worked out for players or teams so far (Wolf, Plachta, Treutle).
Personally I feel our best prospects have to go to North America to improve their chances (albeit slightly) to make it to the NHL.
As far as the physical aspect of the game is concerned it should not be a problem if he plays junior hockey over there. It's not all that physical. More than German junior hockey for sure, but not (much) more than Oberliga hockey in Germany which Eder has been playing rather well.
He would definitely not be ready for the AHL, but CHL would not be a problem just because of physicality. There may be other factors that could contribute to it not working out for him, but those are risks with every prospect leaving behind his home at a young age to go to another country.